In plywood with suspension provided by high-rubber-content elastic webbing. The seat structure is made of several layers of variable-density, high resilience polyurethane foam. The upper layer is made of single highelastic- content contoured straps which, combined with the lower layer, guarantee enhanced softness over time. “Wing” and “Mix” have an armrest and/or backrest made of a metal frame coated in fireproof polyurethane foam. The entire structure has a breathable heat-bonded quilted fiber casing laminated to a white hypoallergenic cotton fabric which lends softness. A special assembly was used for the structure covering (backrest and armrests). The various parts in fabric were joined by using a bronze-colored strip of eco-leather with double-stitched detail.